讨论其结构尺寸设计方法．
VICKERS电磁阀液压缸﹑液压马达等动作以后，再按顺序使其他执行元件动作。油泵产生的压力先推动液压缸1运动，同时通过顺序阀出来的先导油控制主换向阀阀芯的移动，使工作泵的来油进入动臂油缸实现动臂上升。比例先导减压阀的输出压力越大，控制主换向阀阀芯的位移越大，主换向阀通过的流量越大，动臂上升的人：蔡韵
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